{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9406-1KK20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9406-1KK20","canonicalUrl":"https://aoctrl.com/siemens/5SU9406-1KK20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9406-1KK20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series RCBO, 5SU9406-1KK20, 20 A rated, 6 kA breaking capacity, Type C characteristic, 1P+N, 18 mm wide, IP20.","salesMarkdown":"The Siemens 5SU9406-1KK20 is a 1P+N RCD-operated circuit breaker (RCBO) from the SENTRON 5SU9 series, combining overcurrent protection and residual current detection in a single 18 mm wide module. It carries a 20 A rated current at 30 °C with a Type C tripping characteristic, meaning it handles inrush currents from motor or lighting loads without nuisance tripping. The breaking capacity is 6 kA per both EN 60898 and IEC 60947-2, so it safely interrupts fault currents up to that level in a 230/400 V AC installation. The RCBO detects AC fault currents only (Type AC RCD), and the instantaneous design means no intentional time delay on the residual current element — it trips as soon as the leakage exceeds the threshold. The 1P+N configuration switches the live pole and monitors the neutral, but only the live pole is protected against overcurrent. At 18 mm wide (1 width unit), this RCBO snaps onto a standard DIN rail and accepts conductors from 0.75 mm² up to 35 mm² solid or stranded. The installation depth is 70 mm, with an overall depth of 77 mm — check your enclosure depth if you are retrofitting into a shallow panel. At 40 °C it derates to 18.8 A, at 45 °C to 18.2 A, at 50 °C to 17.4 A, and at 55 °C to 16.2 A. Maximum power loss is 0.75 W, so heat buildup from a single unit is negligible, but in a dense row of RCBOs the cumulative dissipation can raise cabinet temperature — factor the derating curve into your thermal budget.","metaTitle":"Siemens 5SU9406-1KK20 SENTRON RCBO, 20 A, 6 kA, Type C, 1P+N","metaDescription":"Siemens 5SU9406-1KK20 SENTRON RCBO, 20 A rated, 6 kA breaking capacity per EN 60898, Type C characteristic, 1P+N, 18 mm wide. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"0.75 ... 35 mm²","Width":"18 mm","title":"5SU9406-1KK20","Height":"125 mm","Maximum":"0.75 W","Stranded":"0.75 ... 35 mm²","at 30 Cel":"20 A","at 40 Cel":"18.8 A","at 45 Cel":"18.2 A","at 50 Cel":"17.4 A","at 55 Cel":"16.2 A","description":"RCBO, 6 kA, 1P+N, Type AC, 100 mA, C-Char, In: 20 A, Un AC: 230 V, pigtail 600 mm, solid N","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Product designation":"RCD-operated circuit breaker","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Energy limiting class":"3","Number of width units":"1","Type of fault current":"AC","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU9","Current / at AC / rated value":"20 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"6 kA","For Testing Equipment / Minimum":"125 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"1","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage frequency / rated value":"50 Hz","Tripping residual current / rated value":"100 mA","Influence of the surrounding temperature":"Max. 95% humidity","Surge current resistance / at (8/20) μs":"1 kA","Tightening torque / with screw-type terminals":"1.2 ... 2 N·m","Product function / neutral conductor switching":"No","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/72c9410ccdeb1dee7aafcd15f90fdda4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629428&mlfb=5SU9406-1KK20"},"ai":{"faq":[{"question":"What is the depth of 5SU9406-1KK20?","answer":"The overall depth is 77 mm, with an installation depth of 70 mm."},{"question":"What conductor sizes does 5SU9406-1KK20 accept?","answer":"It accepts solid and stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"Where can I buy 5SU9406-1KK20 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for 5SU9406-1KK20?","answer":"The RCBO is halogen-free and silicon-free, and carries approvals per EN 60898 and IEC 60947-2. Standard Siemens documentation includes RoHS and REACH declarations; contact your Siemens representative for specific compliance certificates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9406-1KK20","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SU9406-1KK20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}